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Finding the Fourth Proportional to 78,756.78, 108,687.09 and 44,766.70

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Solution

The fourth proportional to 78,756.78, 108,687.09 and 44,766.70 is: 61,779.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,756.78 : 108,687.09 = 44,766.70 : x
  2. Step 2: Convert to fraction form
    78,756.78/108,687.09 = 44,766.70/x
  3. Step 3: Cross multiply
    78,756.78x = 108,687.09 × 44,766.70
  4. Step 4: Simplify right side
    78,756.78x = 4,865,562,351.90
  5. Step 5: Solve for x
    x = 4,865,562,351.90/78,756.78
  6. Step 6: Final answer
    x = 61,779.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.